Stop Twenty Five: The Mousetrap Part One

Marine had been leaning over your shoulder constantly lately. It seemed like every chance she could, she was checking on you or just observing you, even in ways that didn’t make much sense. You were doing your laundry and she followed you to the door, pretending as though she were waiting for the bathroom despite it being obviously unoccupied. She seemed particularly interested in keeping close watch on you during private times, even when it wasn’t truly private, be it in the living room doing homework or eating alone at the table. It began to get on your nerves after a while. Why wouldn’t your sister leave you to some peace for a bit? You walked up to her and confronted her.

“Marine? Why are you so interested in me lately? You’ve been tailing me nonstop. I’m not stupid, I know you are.”

Her eyes widened and she looked slightly flustered, as though unprepared for such a direct question.

“Well… I’m just worried for you…” she said a bit sadly

She leaned over you a bit to match your height, her massive hangers draping down in front of your face for a small while before she looked at you. She gently rested her hand on your neck and you pushed it aside.

“Why are you touching me like that…? Don’t be weird.”

“Sorry, sorry it’s just…” she paused and looked at you again “You’re going off your SSRI’s now right?”

“Yeah… that was like… three days ago now.”

“Did they tell you what would happen after that? Like side effects and stuff.”

You shook your head.

“All I know is the side effects from getting on it. Like being emotionless.”

“Are your emotions coming back?” she asked with a frown

“A bit… I don’t feel it that strongly but like… I don’t know. It’s hard to know.”

“I bet. I mean… you’ve been on them since you were what, like ten?”

“Yeah. So three years now.”

Marine made an odd face for just a moment. It looked weirdly pleased but not in the way someone showing concern or sympathy would show it. You couldn’t quite make heads or tails of just what sort of expression it was, just that you instinctively knew that something about it was off.

“How about your health? You’re still healthy and everything right? Those things can be a bit harmful developmentally.”

“I think so… why are you so curious about this?”

“I’m just concerned…” Marine said “I don’t want to see you get hurt again, you know?”

“Thanks… but you don’t need to keep following me. I promise I’m fine.”

“I know… I’m just… it’s older sister worries. I can’t help it.”

Marine stood back straight again and turned around to walk into the kitchen. She paused and looked back at you, flashing that weird smile again and winking at you before leaving without another word. It left you completely confused. Why was she acting so strange? Marine was always a very eccentric and confusing person but this was odd even for her.

The next day was a doctor’s appointment. Strange as Marine had been, she was right that a common side effect of being placed on these medications so young was developmental issues. While you had no way of knowing it, what it really boiled down too was if it had inadvertently delayed your puberty somewhat. The massively decreased libido, the strong suppression of various hormones and mental chemicals, all had a possibility of setting things back at great detriment to future wellbeing. As your mom began to usher you to the car, Marine rudely made her way in as well.

“Marine? You don’t have to come with us.” your mother said “You don’t have a doctor's visit today.”

“I want to come. Can’t I?”

“Why?” you asked snidely

“I’m worried…”

“Fine, you can come with us. But please behave, ok?”

Both she and Marine gave an odd look at each other, as though there was some deeper tension to that statement you weren’t aware of.

“I’ll be fine, mom.” she said with a glare

“Alright then.”

Your mom drove you and your sister down to the doctor’s office. After some paperwork and a brief wait, you were called in first, dawning a hospital gown in just your underwear then doing the usual nonsense: weight, height, pee in a cup, and everything else. Finally, your mom and your sister were called back in and Marine gave you another strange look as she saw you in your hospital gown. It made you feel uncomfortable yet also strangely good. It felt like something was opening deep in your belly and releasing butterflies. It was a feeling you had no words to describe, it simply was.

“Mom… why does Marine have to be here…?” you said in a pouty tone

“She’s fine, Anon. Stop being so sensitive.”

The doctor looked over his notes and, thankfully, the news was good. Your bones were fine, height preceding as expected, and your blood was as healthy as could be. There was just one final thing to check.

“If I could ask you and Marine to step out for a moment,” the doctor began “I need to perform the testicular exam.”

Out of the corner of your eye, you saw Marine becoming rather restless. She clutched the hem of her skirt and looked off to the side, lightly tapping her feet.

“Alright.” you mom said, getting up

Marine looked worried.

“Shouldn’t we stay in here? I… well… I’m just worried about him.”

“Marine, he'll be fine. There’s nothing to worry about. We’ve had this doctor since you were kids and he’d never do anything inappropriate or hurt him in any way.”

“That’s right. I only want what’s best for him.” the doctor added “This isn’t going to hurt him or cause him any physical discomfort. I promise. Just a quick test.”

She got another worried look on her face, her feet tapping quicker. She looked back at her mom.

“Can’t I stay?”

“No, Marine. I know you’re protective of him, but we have to leave for a few minutes. We’ll be right by the door.”

She sighed.

“Alright…”

She got up and followed your mom outside before closing the door shut. Next up was one of the most uncomfortable tests any teenager had to experience: the testicular exam. You tepidly dropped your pants and let your doctor gently clutch your balls, coughing every so often. You felt the strange sensation again, the one that Marine’s look had given you and your penis rose all on its own. You turned bright red and became deeply embarrassed. The doctor was completely unphased as you pulled your pants back up, bending over slightly to hide your rather massive erection. It felt deeply uncomfortable. The very slightest touch sent pleasurable waves up and down its length, filling your belly and thighs along with it. You’d never experienced a sensation quite like it. It felt amazing but overpowering, like poking your own eye if that was a pleasurable experience.

Your mom and sister returned and you remained hunched over, feeling your sensitive head pressing hard into your stomach. You couldn’t move. Even the slightest twitch caused that sensation to spread like wildfire. You just wanted to go home. Get some privacy. Marine pretended to look at her phone, her eyes just barely peeking at you.

“Your son seems in perfect health. We’ll keep him off the SSRIs for now so be sure to keep a good eye on his mental health. Physically, I saw no problems.”

“I’m so glad to hear that.” your mom said

After a brief round of questions, they left, allowing you to put your clothes back on again. You tucked your boner into your waistband and pulled your shirt down tight. It just would not go down no matter what. You walked rather awkwardly back to the car and, once inside, sat hunched over slightly. Marine kept stealing glances, pretending she didn’t see the obvious discomfort you were in.Finally, you were home.

 You couldn’t get out fast enough, bolting out of the car and racing up into your room as fast as your legs could take you. You sat on your bed and didn’t even hesitate nor think, stripping off your pants and underwear. Your body was on autodrive, doing what it knew intrinsically to do in such a situation, even if you didn’t understand it yourself. You just had to cure whatever this feeling was that was plaguing you before it drove you insane.

You put your hand on your penis and did what any young man in puberty would do: stroke until you popped. It was easy. Just a few lightly rubs and your stomach had a nice coating of sticky white fluid on it. Yet it wasn’t enough. You NEEDED more. You quickly wiped the semen away and in a few minutes you were stiff as a tree trunk again. It felt so good! You had never felt any experience in the entire world that was like it. The build up, the explosion, it was like no other sensation in the world. Yet, you had no name for it, nor did you have any knowledge of why it  was occurring. All you knew is that rubbing felt good, necessary even. After your second explosion, you finally relaxed enough to rest, letting your penis deflate. You put your pants back on and opened the door to find a very shocked Marine standing just outside it, her face red as a fresh picked apple.

“S-sorry I was just uh… I… do you have my manga in there? I’ve been looking for it everywhere so…”

You could tell she was lying. Not only was she intensely protective of her collection, you could hear it in her voice. That was definitely an excuse she made up on the fly.

“No. I didn’t.”

“Can… can I check…?”

“Sure…”

You opened the door and allowed her inside, observing her as she poked around so that she wouldn’t stumble upon any of your more private personal belongings. She looked quite disappointed.

“It’s not here… Sorry for bothering you.”

“It’s fine.”

“Are you ok? Your hair is all messy and you’re very sweaty.”

You blushed and straightened out your hair.

“Y-yeah just… don’t worry about it. It’s nothing.”

She smiled.

“If you say so.”

The rest of the day proceeded normally, thankfully free of any strange desires to rub yourself. It felt good to be so calm and serene, as though a huge weight had been lifted or, rather, expelled. As you ate dinner, Marine suddenly shot up.

“I need to use the bathroom”

You and your mom both looked in shock. Why was a fifteen year old randomly telling her family this as though she needed permission? Marine quickly walked to the staircase and went to the second floor, leaving you with a skeptical look.

“Isn’t the bathroom down the hall?” you asked

“I imagine she just has some girl things to take care of.” your mom replied “Don’t worry about it. I was the same way she was. It’s nothing to be worried about.”

You looked down at your plate. Something about her behavior did feel wrong though, but you couldn’t quite pin what it was. It was more than just weird, it was wrong. Yet you couldn’t figure out what about it was wrong exactly. Before too long, Marine returned.

“Sorry about that.” she said, straightening out her slightly ruffled skirt and sitting back down

“It’s fine, it’s fine.”

Dinner concluded and you went back upstairs, retreating to the safety of your room so that your sister wouldn’t breathe down your neck again. You flicked on the lights and noticed a very strange sight: a pair of panties leaning slighting off your bed. They were rather cutesy, colored pink and full of hearts. The same strange opening feeling in your stomach occurred again and you felt your penis harden almost instantaneously. Those had to be your sister’s panties. Was that what she came up to do? It was the only sensible conclusion you could draw. You knew you shouldn’t but your ape brain paid that doubt little mind. You pulled off your pants and walked straight over to the panties. You could see that inside they were slightly wet, yet it wasn’t pee. It was far too sticky to be pee. You couldn’t resist. You put the panties against your shaft and went to town, banging one out and releasing all you had into the soft plush fabric.

Your very first post-nut regret dawned on you. Here you were with your sister’s underwear, stroking your privates against them and releasing some nasty fluid into them. To say the situation looked bad would be an understatement. Little did you know that just outside your door, your sister had heard every little detail, fiddling herself with her fingers against her pantieless skirt.